Effect of cadmium on composition and diversity of bacterial communities in activated sludges
作者： Yung-Pin Tsai , Sheng-Jie You , Tzu-Yi Pai , Ko-Wei Chen
DOI: 10.1016/J.IBIOD.2005.03.005
关键词: Microbial population biology 、 Zoogloea ramigera 、 Nitrifying bacteria 、 Environmental chemistry 、 Cadmium 、 Bacteria 、 Activated sludge 、 Microbiology 、 Enhanced biological phosphorus removal 、 Biology 、 Betaproteobacteria
摘要: Microbial communities of two kinds activated sludge for removing carbon, nitrogen and phosphate (nutrient removal sludge) were identified compared by combining cloning–denaturing gradient gel electrophoresis methods. The sludges sampled in an anaerobic–anoxic–oxic system operating under the same conditions, except one without addition cadmium (Cd0) other with 5 mg l 1 (Cd5). Bacteria phylum Proteobacteria predominant both Cd0 Cd5 (39.6% 35.1% total bacteria, respectively). However, bacteria class Betaproteobacteria significantly more abundant than (30.7% 2.1%, Species related to nutrient removal, such as nitrifying (Nitrosomonas communis), floc-forming (Zoogloea ramigera) phosphate-accumulating organisms (Rubrivivax gelatinosus), species sludge, but not found sludge. Cadmium was toxic bacterial community especially Betaproteobacteria. comparison microbial between these further discussed paper. r 2005 Elsevier Ltd. All rights reserved.
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